I. L. Mushkalo, I. F. Shedov
Nov 1, 1974
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Journal
Chemistry of Heterocyclic Compounds
Abstract
Bisquaternary salts in which the hydrogen atoms of the heterocyclic rings are bonded by polymethylene chains of different lengths were synthesized from lepidine and 2,4-di-methylthiazole. Biscyanine dyes were obtained from salts with an active methyl group. The absorption spectra of the dyes were investigated. It is shown that the unconjugated chromophores linked by a saturated chain of short length have a mutual effect upon one another, and this interaction decreases rapidly as the length of the isolating group increases.